Not sure you know what a pack out is my friend. So just to be safe, as I'm sure (if) you wouldn't be the only one that doesn't know---
The pack out is simply a shipping option. Just like ups vs usps vs fedex vs dhl ect. Just an option. (Though it's not a service to mail, just used that as an example to illustrate that it does not matter what is shipped like with those companies). It was offered as an option mostly for MIB people who would return items (not just hot toys) because the package was damaged in shipping. But it's not only MIB that use it. Anyone that is worried about damage also uses it. Anyone can use it though. Never a bad idea. It's essentially a little extra padding and an extra exterior shipping layer. Remember, sideshow is a business, so they can't spend 15 bucks on bubble wrap on every package and buy another box just so the already provided mailer doesn't get damaged. That's bad business. But being a mainly adult oriented collector company, they cater to people that do often want that extra peace of mind and insurance so they offer the protection at a fee. It's actually a very smart move. Best of both worlds as you will.
Hope that helps, if you didn't know. Or others didnt. If you did your probably not reading at this point anyway, which is probably the same for most everyone else. So I'd like to take this opportunity to confess that I often wear ladies...umm never mind.